TPS65400RGZR

1 Features

• Efficiency up to 95% for Each Switching Regulator

• Switching Regulator Specifications:

– Input Voltage Range: 4.5 to 18 V

– Vout Range: 0.6 V-90%Vin

– SW1, SW2 Iout: 4-A Max

– SW3, SW4 Iout: 2-A Max

• Pre-Bias Startup Algorithm Minimizes Voltage Dip During Startup

• Internal Undervoltage Lockout (UVLO), Overcurrent Protection (OCP), Overvoltage Protection (OVP), and Overtemperature Protection (OTP)

• AECQ-100 Grade 1 Option

• Thermally-Enhanced 7-mm × 7-mm 48-Pin, 0.5-mm Pitch VQFN Package

• Pin Accessible Features:

– Adjustable VOUT With External Feedback Resistors

– Sequencing Control Through Precision Enable Pins for Each Switcher

– Resistor Adjustable PWM Switching Frequency from 275 kHz to 2.2 MHz

– Clock Sync Input and Clock Output

– Soft-Start Delay Through External Capacitor

– Current Sharing Between SW1 and SW2 and Between SW3 and SW4 Allows Support of Higher Current Needs if Required

• PMBus Runtime Control and Status

– Runtime Voltage Positioning Through Adjustment of VREF

– Enable and Disable of Each Switcher

– Fault and Status Monitoring

• User-Configurable PMBus / I2C Options, Saved in EEPROM

– Power Supply Turn-On and Turn-Off Sequencing

– Sequencing can be Based on Fixed Time Delays or PGOOD Dependence

– Initial Voltage Positioning Through VREF Configuration

– PWM Frequency Adjustment for Each Switcher

– Individual PWM Phase Alignment for Each Switcher to Minimize Ripple and Capacitor Size

– Adjustable Current Limit on Each Regulator Enables Size and Cost Optimization of Inductors

– Soft-Start Time

2 Applications

• Small Cellular Base Stations (BTS) (for Example: Picocells and Microcells); Macro BTS (Using Multiple PMUs)

• Power over Ethernet (PoE) Powered Communications Infrastructure Equipment

• Automotive Infotainment and Telematics

• Powering DSP and MCUs

• Industrial and Factory Automation

• Systems Requiring Small Form Factor, High-Efficiency, High-Ambient Operating Temperature, and Flexible Power Management

3 Description

The TPS65400 is an integrated PMU optimized for applications requiring small form factor and high power conversion efficiency, enabling small space-constrained equipment with high ambient operating temperature without cooling. It provides high-power efficiency at a system level by enabling a single stage conversion from an intermediate distribution bus with an optimized combination of regulators.

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